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Atomic structure

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Question 20
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An ion of an isotope of element X X\,X has a charge of 2+2+2+.

In this ion:

  • there are 1.25 times as many neutrons as protons
  • the ratio of the number of neutrons to the number of electrons is 1.5:1 1.5 : 1\,1.5:1

What is the identity of this isotope of XXX?

A

25Mg^{25}\text{Mg}25Mg

B

27Mg^{27}\text{Mg}27Mg

C

27Al^{27}\text{Al}27Al

D

30Mg^{30}\text{Mg}30Mg

Markscheme

Atomic structure Questions

  1. A Level
  2. /Chemistry
  3. /Atomic structure

33 exam-style questions on AQA A Level Chemistry Atomic structure, covering Fundamental particles, Mass number and isotopes, and Electron configuration. Each one has a worked solution and a mark scheme showing where the marks go.

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